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Electronics Engineering

Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.

24,372 Questions

How many types of potentiometer?

There are basically two types of resistors.
-Fixed resistors
-Variable resistors

FIXED TYPE:
Fixed resistors are classified into 4 types based on various factors like manufacturing style,resistance range,power rating etc.
The four types of fixed resistors are
1)Carbon composition
2)Carbon film
3)Metal film(again classified into thick film resistors and thin film resistors)
4)Wire wound-which consists of power style type and precision style type

VARIABLE TYPE:
They are used in electronic circuits to adjust the value of voltages and currents.Ex. They are used in televisions as volume control,brightness control etc. There are three types of variable resistors.They are
1)Potentiometer-classified into carbon potentiometer and wire wound potentiometer
2)Rheostat
3)Trimmer

Wire-wound, carbon compound, metal strip, and in modern times, the silicon transistors in linear region are used as resistors

Calculate the total number of electrons flowing through a circuit in 20 minutes and 40 seconds if a current of 40 mA flows through the circuit?

The current in a circuit is a measure of passing electrical charge per second. Each electron carries a fix amount of charge. Therefore the number of charge moving depends on the speed of the charge, in this case electrons. In conductors like copper, there are just so many free electrons that they move in bulk slower than snail.

The the Cathode ray tube, the speed is at a fraction of speed of light, not many electrons are flying.

For actual number, look up speed of electron in copper at room temperature, and multiple the electrical charge constant to get at the current. This must be a standard class tutorial.

What are advantages you have of frequency domain analysis over time analysis?

Frequency Analysis is much easier. Some equations can't be solved in time domain while they can be solved easily in frequency domain. When moving to frequency domain you change the differential equation into algebric equation.

Also, in frequency domain it is easy to apply filters and compute their specifications.

In telecommunications, using multiple frequencies enables more than one user to use the service at the same time if having different frequency, this enables less delay for the signal. Also, it would be easier, when using frequency domain- to give each user, or each standard (GSM, Satellite ...) it's own frequency range without interfering. This can't be done in time domain

What is low voltage capacitor?

A low voltage capacitor is an electrical component designed to store and release electrical energy at low voltage levels, typically under 50 volts. These capacitors are commonly used in various applications, including power supplies, signal processing, and filtering in electronic circuits. They come in various types, such as ceramic, electrolytic, and film capacitors, each suited for specific purposes based on their characteristics and performance. Low voltage capacitors help stabilize voltage levels and improve energy efficiency in electronic devices.

Define Edge Triggered Flip-Flop?

Manner in which a flip-flopis activated by a signal transition.It may be either +ve or -ve edge triggered fliop-flop.

What is a bistellar flip?

A bistellar flip is another term for a Pachner move, any of a set of ways of replacing a triangulation of a piecewise linear manifold by a different triangulation of a homeomorphic manifold.

What is The Resister Colour Code?

0 - black

1 - brown

2 - red

3 - orange

4 - yellow

5 - green

6 - blue

7 - violet

8 - grey

9 - white

20% - no band

10% - silver

5% - gold

Standard resistors use a system of 4 bands: 2 for numeric value, 1 for number of zeros following the value, and 1 for % tolerance.

There are special codings using the above colors for precision resistors, temperature coefficients, etc. that are used where applicable.

How is a non-conducting diode biased?

A nonconducting diode is biased in the reversed direction (reverse polarization).

Absolute decentralization is as hypothetical as absolute centralization Discuss?

"http://wiki.answers.com/Q/Absolute_decentralization_is_as_hypothetical_as_absolute_centralization_Discuss"